Journal of the Textile Machinery Society of Japan
Online ISSN : 1881-1159
Print ISSN : 0040-5043
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Volume 37, Issue 1
Displaying 1-3 of 3 articles from this issue
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  • Viscoelastic Combining Flow in a T-shaped Tube
    Kiyoji Nakamura, Taro Nishimura, Ichiro Miyahara, Takashi Noda, Akira ...
    1991 Volume 37 Issue 1 Pages 1-7
    Published: 1991
    Released on J-STAGE: October 24, 2006
    DOIhttps://doi.org/10.4188/jte1955.37.1
    JOURNAL FREE ACCESS
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    A viscoelastic combining flow in a T-shaped tube is examined using polymer (polyacrylamide) solutions. Streamlines near the combining part were observed from the two- or three-dimensional standpoint of view. Upstream of the combining part, circulating secondary flows were observed in the T-shaped tube as well as in a T-shaped channel composed of parallel plates. The streamline length changes according to the growth of the circulating secondary flow. Curves of streamline length plotted with Weissenberg number present an elastic effect of viscoelastic liquid and nearly become one straight line for the various throttling ratios and polymer concentrations. Hence, the elastic property of polymer solution contributes to the growth of the circulating secondary flow for the T-shaped combining tube flow.
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  • Experiments of Flow of Air Jet Loom with Air Guides
    Part 2: Characteristics of Air Flow in Air Guides and Air Tubes
    Minoru Ishida, Atsushi Okajima, Yukiyasu Shimada, Takeo Kurata, Fumita ...
    1991 Volume 37 Issue 1 Pages 8-13
    Published: 1991
    Released on J-STAGE: October 24, 2006
    DOIhttps://doi.org/10.4188/jte1955.37.8
    JOURNAL FREE ACCESS
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    The characteristics of flows in tubes with different diameters are studied, and compared with flows in tubes with slits.
    The main results are as follows:
    (1) The flow in a tube can be divided into two regions by the difference of flow feature.
    (2) The flow in the first region shows similar features to a free jet flow untill a jet flow from a nozzle reaches a tube wall and the static pressure on the tube wall is negative.
    (3) The other region is a down stream part of the tube and shows the characteristics of a pipe flow. The effects of the diameter, gap distance between a nozzle and a tube, and the slit are classified.
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  • Robot Hand with a Sensor for Cloth Handling
    Eiichi Ono, Hidehiko Okabe, Hitoshi Akami, Noboru Aisaka
    1991 Volume 37 Issue 1 Pages 14-24
    Published: 1991
    Released on J-STAGE: October 24, 2006
    DOIhttps://doi.org/10.4188/jte1955.37.14
    JOURNAL FREE ACCESS
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    A robot or robot system is regarded as a general-purpose machine system that, like a human, can perform many tasks under conditions un-known a priori. In this paper, it was shown that a robot hand to handle pieces of cloth was manufactured for trial and plural functions of the hand was studied experimentally. The results obtained were as follows.
    (1) The robot hand was able to separate a piece of cloth (about 0.5mm in thickness) from a stack of pieces of cloth.
    (2) The output signal from the strain gauge of the hand considered to be nearly in proportion to the thickness of pieces of cloth (0.1mm-3.0mm in thickness, under a pressure of 2.5N/cm2) held by the hand and by the signal, it was possible to distinguish thickness of the pieces of cloth.
    (3) The tension of a piece of cloth could be controlled between 0.09-0.12N by the arm and the hand.
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